A dual-machine control switch, video transmission system and train control display system

Abstract

The present invention discloses a dual-machine control switch, a video transmission system and a train control display system. By setting an optical switch, a video signal is converted into an optical signal for switching, thereby avoiding directly switching the electrical signal corresponding to the video signal. When the optical signal is used for switching, it is not easy to be interfered by the electromagnetic environment, and the display screen is not easy to flash.

Description

Technical Field

[0001] The present invention relates to the technical field of video switchers, and in particular to a dual-machine control switcher, a video transmission system and a train control display system. Background Art

[0002] The display part of the TV system includes a video switcher and a display. The function of the video switcher is to switch, repeat, process and copy the image signals transmitted by the system. It can automatically or manually control multiple video signals so that the display can display the required video.

[0003] The related technology generally switches the multi-channel video output of the computer in the electrical signal to select the video signal that needs to be transmitted and displayed, and converts the switched electrical signal into an optical signal, which is transmitted to the remote display through an optical fiber for display. The problem is that the video switching is switched and selected in the electrical signal, and the video electrical signal is a weak signal. If there are many video signal data lines and the switching circuit is complex, it is easy to be interfered by the electromagnetic environment, resulting in the phenomenon of display screen flickering. Summary of the invention

[0004] The present invention provides a dual-machine control switch, a video transmission system and a train control display system, so as to realize switching after converting a video signal into an optical signal, thereby avoiding directly switching an electrical signal corresponding to the video signal. When using an optical signal for switching, it is not easy to be interfered by the electromagnetic environment, and the display screen is not easy to flicker.

[0005] To achieve the above object, an embodiment of the present invention provides a dual-machine control switch, comprising: a transmitting end and a receiving end, wherein signals are transmitted between the transmitting end and the receiving end via an optical fiber; the transmitting end comprises a first signal converter, a second signal converter and an optical switch;

[0006] One end of the first signal converter is used to input a first electrical signal corresponding to the first video, and the other end is connected to the first input end of the optical switch, and the first signal converter is used to convert the first electrical signal into a first optical signal;

[0007] One end of the second signal converter is used to input a second electrical signal corresponding to the second video, and the other end is connected to the second input end of the optical switch, and the second signal converter is used to convert the second electrical signal into a second optical signal;

[0008] The optical switch is used to switch the first input end or the second input end to be connected with the output end, so that one of the first optical signal or the second optical signal passes through;

[0009] The output end of the optical switch is connected to one end of the receiving end, and the receiving end is used to convert the first optical signal or the second optical signal into a third electrical signal.

[0010] Optionally, the receiving end includes a third signal converter;

[0011] The output end of the optical switch is connected to the third signal converter, and the third signal converter is used to convert the first optical signal or the second optical signal into a third electrical signal.

[0012] Optionally, the transmitting end further includes an optical splitter; the receiving end includes a fourth signal converter and a fifth signal converter;

[0013] The input end of the optical splitter is connected to the output end of the optical switch, the first output end of the optical splitter is connected to the fourth signal converter, and the second output end of the optical splitter is connected to the fifth signal converter;

[0014] The optical splitter is used to split the first optical signal or the second optical signal output by the optical switch into two optical signals, the fourth signal converter is used to convert one of the optical signals into a fourth electrical signal, and the fifth signal converter is used to convert the other optical signal into a fifth electrical signal.

[0015] To achieve the above object, a second embodiment of the present invention provides a video transmission system, including the dual-machine control switch provided in any embodiment of the present invention, and further including: a first video output device, a second video output device and a display;

[0016] The dual-machine control switch is connected to the first video output device, the second video output device and the display device respectively. The dual-machine control switch device is used to switch and select the first video output by the first video output device or the second video output by the second video output device. The display device is used to display the video selected by the dual-machine control switch device.

[0017] According to an embodiment of the present invention, the first video outputter and the second video outputter are a master and a slave video outputter to each other.

[0018] According to one embodiment of the present invention, the dual-machine control switch further includes an optical switch controller;

[0019] The optical switch controller is connected to the first video output device and the second video output device respectively, and is used to monitor the status of the first video output device and the status of the second video output device, and control the first input end of the optical switch to be connected to the output end of the optical switch, or control the second input end of the optical switch to be connected to the output end of the optical switch according to the monitoring result.

[0020] According to an embodiment of the present invention, the monitoring result includes a first state and a second state, the first state is a state in which the first video output device fails or the first video output device is on standby and the second video output device outputs a video; the second state is a state in which the second video output device fails or the second video output device is on standby and the first video output device outputs a video;

[0021] The optical switch controller is used to control the second input end to be connected to the output end of the optical switch according to the first state; the optical switch controller is also used to control the first input end to be connected to the output end of the optical switch according to the second state.

[0022] According to one embodiment of the present invention, when the receiving end of the dual-machine control switch includes a fourth signal converter and a fifth signal converter, the first port of the display is connected to the output end of the fourth signal converter, and the second port of the display is connected to the output end of the fifth signal converter.

[0023] According to an embodiment of the present invention, the first port of the display is a DVI port, and the second port of the display is an HDMI port.

[0024] To achieve the above-mentioned purpose, the third aspect of the present invention further proposes a train control display system, including the video transmission system described in any embodiment of the present invention.

[0025] According to the dual-machine control switch, video transmission system and train control display system proposed in the embodiment of the present invention, the dual-machine control switch includes: a transmitting end and a receiving end, and signals are transmitted between the transmitting end and the receiving end through optical fiber; the transmitting end includes a first signal converter, a second signal converter and an optical switch; one end of the first signal converter is used to input a first electrical signal corresponding to the first video, and the other end is connected to the first input end of the optical switch, and the first signal converter is used to convert the first electrical signal into a first optical signal; one end of the second signal converter is used to input a second electrical signal corresponding to the second video, and the other end is connected to the second input end of the optical switch, and the second signal converter is used to convert the second electrical signal into a second optical signal; the optical switch is used to switch the first input end or the second input end to be connected with the output end, so that one of the first optical signal or the second optical signal passes; the output end of the optical switch is connected to one end of the receiving end, and the receiving end is used to convert the first optical signal or the second optical signal into a third electrical signal. In this way, switching is performed after converting the video signal into an optical signal, avoiding directly switching the electrical signal corresponding to the video signal. When switching using an optical signal, it is not easy to be interfered by the electromagnetic environment, and it is not easy to cause the display screen to flash.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 It is a structural schematic diagram of a dual-machine control switch in the prior art;

[0029] Figure 2 is a schematic diagram of the structure of a dual-machine control switch proposed in an embodiment of the present invention;

[0030] Figure 3 is a structural diagram of a dual-machine control switch proposed in one embodiment of the present invention;

[0031] Figure 4 is a structural schematic diagram of a dual-machine control switch proposed in another embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of the structure of a video transmission system proposed in an embodiment of the present invention;

[0033] Figure 6 It is a structural diagram of a video transmission system proposed in one embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0036] Figure 1 Schematic diagram of the structure of a dual-machine control switch in the prior art. Figure 1 As shown, the dual-machine control switch 1 includes a transmitting end 11 and a receiving end 12, wherein the transmitting end 11 includes an electric switching switch 13 and an electric signal to optical signal converter 14, and the receiving end 12 includes an optical signal to electric signal converter 15. The first input end of the electric switching switch 13 is used to receive a first electric signal corresponding to a first video, and the second input end is used to receive a second electric signal corresponding to a second video. The electric switching switch 13 is used to switch the first input end to be connected to its output end, or the second input end to be connected to its output end, so that the output end of the electric switching switch 13 outputs the first electric signal or the second electric signal; the output end of the electric switching switch 13 is connected to the input end of the electric signal to optical signal converter 14, and the output end of the electric signal to optical signal converter 14 is connected to the input end of the optical signal to electric signal converter 15, and the electric signal to optical signal converter 14 is used to convert the first electric signal or the second electric signal into an optical signal, and the optical signal to electric signal converter 15 is used to convert the optical signal converted from the first electric signal or the second electric signal into an electric signal again.

[0037] The dual-machine control switch uses an electric switch so that the first electric signal and the second electric signal are switched in the electric switch. This is easily interfered by the electromagnetic environment and screen flickering is likely to occur during switching.

[0038] Therefore, the embodiment of the present invention proposes a new dual-machine control switch, a video transmission system and a train control display system to solve the above problems.

[0039] Figure 2 Schematic diagram of the structure of the dual-machine control switch proposed in the embodiment of the present invention. Figure 2 As shown, the dual-machine control switch 100 includes: a transmitting end 10 and a receiving end 20, and signals are transmitted between the transmitting end 10 and the receiving end 20 through optical fibers; the transmitting end 10 includes a first signal converter 101, a second signal converter 102 and an optical switch 103;

[0040] One end of the first signal converter 101 is used to input a first electrical signal corresponding to the first video, and the other end is connected to a first input end of the optical switch 103. The first signal converter 101 is used to convert the first electrical signal into a first optical signal;

[0041] One end of the second signal converter 102 is used to input a second electrical signal corresponding to the second video, and the other end is connected to the second input end of the optical switch 103. The second signal converter 102 is used to convert the second electrical signal into a second optical signal;

[0042] The optical switch 103 is used to switch the first input end or the second input end to be connected with the output end, so that one of the first optical signal or the second optical signal passes through;

[0043] The output end of the optical switch 103 is connected to one end of the receiving end 20 , and the receiving end 20 is used to convert the first optical signal or the second optical signal into a third electrical signal.

[0044] It should be noted that the first video and the second video can be provided by a video output device, such as a server.

[0045] For example, a first video is provided by a first server, and a second video is provided by a second server. A first electrical signal corresponding to the first video provided by the first server is input into a first signal converter 101, and the first signal converter 101 converts the first electrical signal into a first optical signal. A second electrical signal corresponding to the second video provided by the second server is input into a second signal converter 102, and the second signal converter 102 converts the second electrical signal into a second optical signal. The first optical signal is input into a first input end of an optical switch 103, and the second optical signal is input into a second input end of the optical switch 103. The optical switch 103 can switch the first input end to be connected with the output end, or the second input end to be connected with the output end according to demand, so as to output the first optical signal or the second optical signal. That is to say, when the optical switch 103 switches the first input end to be connected with the output end, the output end of the optical switch 103 outputs the first optical signal, and accordingly, the receiving end 20 converts the first optical signal into a third electrical signal; when the optical switch 103 switches the second input end to be connected with the output end, the output end of the optical switch 103 outputs the second optical signal; and accordingly, the receiving end 20 converts the second optical signal into a third electrical signal.

[0046] It can be understood that by first converting the electrical signal of the video into an optical signal and then switching one of the optical signal outputs through an optical switch, since the optical signal has strong anti-interference ability, electromagnetic interference during switching is avoided and the problem of screen flicker during switching is solved.

[0047] The first signal converter 101 and the second signal converter 102 may be electro-optical converters in the art.

[0048] Alternatively, if Figure 3 As shown, the receiving end 20 includes a third signal converter 201;

[0049] The output end of the optical switch 103 is connected to the third signal converter 201 , and the third signal converter 201 is used to convert the first optical signal or the second optical signal into a third electrical signal.

[0050] The third signal converter 201 may be a photoelectric converter in the art.

[0051] The optical signal is transmitted between the output end of the optical switch 103 and the third signal converter 201 via the optical fiber.

[0052] Alternatively, if Figure 4 As shown, the transmitting end 10 further includes an optical splitter 104; the receiving end 20 includes a fourth signal converter 202 and a fifth signal converter 203;

[0053] The input end of the optical splitter 104 is connected to the output end of the optical switch 103, the first output end of the optical splitter 104 is connected to the fourth signal converter 202, and the second output end of the optical splitter 104 is connected to the fifth signal converter 203;

[0054] The optical splitter 104 is used to split the first optical signal or the second optical signal output by the optical switch 103 into two optical signals, the fourth signal converter 202 is used to convert one of the optical signals into a fourth electrical signal, and the fifth signal converter 203 is used to convert the other optical signal into a fifth electrical signal.

[0055] It should be noted that when the output end of the optical switch 103 outputs the first optical signal, the optical splitter 104 splits the first optical signal into two optical signals, and the first optical signal is transmitted to the fourth signal converter 202 of the receiving end 20 through the optical fiber, and is converted into a fourth electrical signal corresponding to the first optical signal by the fourth signal converter 202. The second optical signal is transmitted to the fifth signal converter 203 of the receiving end 20 through the optical fiber, and is converted into a fifth electrical signal corresponding to the second optical signal by the fifth signal converter 203.

[0056] When the output end of the optical switch 103 outputs the second optical signal, the optical splitter 104 splits the second optical signal into two optical signals, and the first second optical signal is transmitted to the fourth signal converter 202 of the receiving end 20 through the optical fiber, and is converted into a fourth electrical signal corresponding to the first second optical signal by the fourth signal converter 202. The second second optical signal is transmitted to the fifth signal converter 203 of the receiving end 20 through the optical fiber, and is converted into a fifth electrical signal corresponding to the second second optical signal by the fifth signal converter 203.

[0057] Therefore, through the setting of the splitter 104, two signal beams appear at the receiving end, so that the two signal beams can be used as the main signal and the slave signal. One of the two transmission paths can be the main transmission path, and the other can be the slave transmission path, avoiding the failure of only a single transmission path during the transmission process, causing problems for subsequent video display.

[0058] Figure 5 FIG. 1 is a schematic diagram of the structure of a video transmission system proposed in an embodiment of the present invention. Figure 5 As shown, the video transmission system 200 includes the dual-machine control switch 100 proposed in any embodiment of the present invention, and also includes: a first video output device 210, a second video output device 211 and a display 212;

[0059] The dual-machine control switch 100 is connected to the first video output 210, the second video output 211 and the display 212 respectively. The dual-machine control switch 100 is used to switch and select the first video output by the first video output 210 or the second video output by the second video output 211, and the display 212 is used to display the video selected by the dual-machine control switch 100.

[0060] According to an embodiment of the present invention, the first video output device 210 and the second video output device 211 are master and slave video output devices to each other. The first video output device 210 may be a first server, and the second video output device 211 may be a second server.

[0061] According to one embodiment of the present invention, Figure 6 As shown, the dual-machine control switch 100 further includes an optical switch controller 105;

[0062] The optical switch controller 105 is connected to the first video output 210 and the second video output 211 respectively, and is used to monitor the status of the first video output 210 and the status of the second video output 211, and control the first input end of the optical switch 103 to be connected to the output end of the optical switch 103, or control the second input end of the optical switch 103 to be connected to the output end of the optical switch 103 according to the monitoring result.

[0063] The monitoring result includes a first state and a second state, the first state is a state in which the first video output device 210 fails or the first video output device 210 is on standby and the second video output device 211 outputs a video; the second state is a state in which the second video output device 211 fails or the second video output device 211 is on standby and the first video output device 210 outputs a video;

[0064] The optical switch controller 105 is used to control the second input end to be connected to the output end of the optical switch 103 according to the first state; the optical switch controller 105 is also used to control the first input end to be connected to the output end of the optical switch 103 according to the second state.

[0065] That is to say, in order to prevent the interruption of the video signal, the master-slave video output device is generally used for backup at present. When the master video output device fails, the slave video output device can be substituted, or when the slave video output device fails, the master video output device can be substituted. The first video output device 210 and the second video output device 211 in the system 200 are master-slave video output devices. The optical switch controller 105 can control the optical switch 103 according to the state of the first video output device 210 and the second video output device 211. Specifically, when the first video output device 210 outputs a video and the second video output device 211 fails or is on standby, the first input end of the optical switch 103 can be controlled to be connected to the output end to pass the first optical signal. When the second video output device 211 outputs a video and the first video output device 210 fails or is on standby, the second input end of the optical switch 103 can be controlled to be connected to the output end to pass the second optical signal. In other embodiments, if both the first video output device 210 and the second video output device 211 fail, the optical switch controller 105 can also issue an alarm.

[0066] According to one embodiment of the present invention, Figure 5 and Figure 6 As shown, when the receiving end 20 of the dual-machine control switch 100 includes a fourth signal converter 202 and a fifth signal converter 203, the first port of the display 212 is connected to the output end of the fourth signal converter 202, and the second port of the display 212 is connected to the output end of the fifth signal converter 203.

[0067] Optionally, the first port of the display 212 is a DVI port, and the second port of the display 212 is an HDMI port.

[0068] That is to say, the signals transferred out by the fourth signal converter 202 and the fifth signal converter 203 are the same, and then when both the first port and the second port of the display 212 receive the signal, the display 212 can display it, and if one of the ports does not receive the signal, there is also a backup signal, thereby avoiding problems with the signal during transmission and affecting the display of the display 212. In addition, the two ports of the display 212 are different, and are more compatible with the signal formats converted by the fourth signal converter 202 and the fifth signal converter 203.

[0069] The embodiment of the present invention further provides a train control display system, including the video transmission system 200 of any embodiment of the present invention. That is, the train control display system can be equipped with the video transmission system 200 to achieve no screen flickering when the video signal is switched, and to achieve backup signals during the signal transmission process, so as to avoid the problem of intermittent video display on the display due to failure of the transmission path.

[0070] That is to say, the video switching is done in the optical path, the switching is simple, and the mechanical device is not easily interfered by the electromagnetic environment. After the optical path is switched, the optical signal is split and processed for dual-path transmission, realizing the principle of dual channels and dual backup.

[0071] In summary, according to the dual-machine control switch, video transmission system and train control display system proposed in the embodiment of the present invention, the dual-machine control switch includes: a transmitting end and a receiving end, and signals are transmitted between the transmitting end and the receiving end through optical fiber; the transmitting end includes a first signal converter, a second signal converter and an optical switch; one end of the first signal converter is used to input a first electrical signal corresponding to the first video, and the other end is connected to the first input end of the optical switch, and the first signal converter is used to convert the first electrical signal into a first optical signal; one end of the second signal converter is used to input a second electrical signal corresponding to the second video, and the other end is connected to the second input end of the optical switch, and the second signal converter is used to convert the second electrical signal into a second optical signal; the optical switch is used to switch the first input end or the second input end to be connected with the output end, so that one of the first optical signal or the second optical signal passes; the output end of the optical switch is connected to one end of the receiving end, and the receiving end is used to convert the first optical signal or the second optical signal into a third electrical signal. In order to realize switching after converting the video signal into an optical signal, it is avoided to directly switch the electrical signal corresponding to the video signal. When the optical signal is used for switching, it is not easy to be interfered by the electromagnetic environment, and it is not easy to cause the display screen to flash.

[0072] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-machine control switch, It is characterized in that include: A transmitting end and a receiving end, wherein signals are transmitted between the transmitting end and the receiving end via optical fibers; The transmitting end includes a first signal converter, a second signal converter and an optical switch; One end of the first signal converter is used to input a first electrical signal corresponding to the first video, and the other end is connected to the first input end of the optical switch, and the first signal converter is used to convert the first electrical signal into a first optical signal; One end of the second signal converter is used to input a second electrical signal corresponding to the second video, and the other end is connected to the second input end of the optical switch, and the second signal converter is used to convert the second electrical signal into a second optical signal; The optical switch is used to switch the first input end or the second input end to be connected with the output end, so that one of the first optical signal or the second optical signal passes through; The output end of the optical switch is connected to one end of the receiving end, and the receiving end is used to convert the first optical signal or the second optical signal into a third electrical signal; The first video is provided by a first video output device, and the second video is provided by a second video output device; The dual-machine control switch also includes an optical switch controller; the optical switch controller is connected to the first video output device and the second video output device respectively, and is used to monitor the status of the first video output device and the status of the second video output device, and control the first input end of the optical switch to be connected to the output end of the optical switch, or control the second input end of the optical switch to be connected to the output end of the optical switch according to the monitoring results.

2. The dual-machine control switch according to claim 1, It is characterized in that The receiving end includes a third signal converter; The output end of the optical switch is connected to the third signal converter, and the third signal converter is used to convert the first optical signal or the second optical signal into a third electrical signal.

3. The dual-machine control switch according to claim 1, It is characterized in that The transmitting end further includes an optical splitter; the receiving end includes a fourth signal converter and a fifth signal converter; The input end of the optical splitter is connected to the output end of the optical switch, the first output end of the optical splitter is connected to the fourth signal converter, and the second output end of the optical splitter is connected to the fifth signal converter; The optical splitter is used to split the first optical signal or the second optical signal output by the optical switch into two optical signals, the fourth signal converter is used to convert one of the optical signals into a fourth electrical signal, and the fifth signal converter is used to convert the other optical signal into a fifth electrical signal.

4. A video transmission system, It is characterized in that The dual-machine control switch comprises the dual-machine control switch as claimed in any one of claims 1 to 3, further comprising: a first video output device, a second video output device and a display; The dual-machine control switch is connected to the first video output device, the second video output device and the display device respectively. The dual-machine control switch device is used to switch and select the first video output by the first video output device or the second video output by the second video output device. The display device is used to display the video selected by the dual-machine control switch device.

5. The video transmission system according to claim 4, It is characterized in that The first video output device and the second video output device are mutually a master and a slave video output device.

6. The video transmission system according to claim 4, It is characterized in that The monitoring result includes a first state and a second state, wherein the first state is a state in which the first video output device fails or the first video output device is on standby and the second video output device is outputting a video; and the second state is a state in which the second video output device fails or the second video output device is on standby and the first video output device is outputting a video. The optical switch controller is used to control the second input end to be connected to the output end of the optical switch according to the first state; the optical switch controller is also used to control the first input end to be connected to the output end of the optical switch according to the second state.

7. The video transmission system according to any one of claims 4 to 6, It is characterized in that When the receiving end of the dual-machine control switch includes a fourth signal converter and a fifth signal converter, the first port of the display is connected to the output end of the fourth signal converter, and the second port of the display is connected to the output end of the fifth signal converter.

8. The video transmission system according to claim 7, It is characterized in that The first port of the display is a DVI port, and the second port of the display is an HDMI port.

9. A train control display system, It is characterized in that Comprising a video transmission system as described in any one of claims 4-8.

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